Two lumberjacks were competing in the finals of the annual lumberjack competition. One was older and more experienced, the other a younger and stronger lumberjack. The rules were simple: Whoever can fell the most trees in a day, wins.
The younger lumberjack, full of enthusiasm, immediately got to work. He could hear the other lumberjack in the distance. At regular intervals, the sounds of trees being felled would stop. The younger lumberjack grew even more confident, because he knew that meant the older lumberjack was taking a rest, while he had the stamina to keep going.